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TCL Main Board for 55S421 (Service No. 55S421LDAA)

SKU:
sj-55S421LDAA-MAIN
$49.00
(You save $23.81)
$25.19
$49.00
(You save $23.81)
$25.19
Ships same business day if ordered before 4pm CT!
We highly recommend matching your part number. Learn more
PLEASE NOTE: There may be more than one different main board for this model. This board is compatible with 55S421 TVs with Service No. 55S421LDAA (found on sticker on back of TV).

TCL Main Board for 55S421 (Service No. 55S421LDAA)

Known Models

BrandModelsVersions
TCL55S42155S421LDAA
55S421LDAA
55S421TDAA
55S425LFBA
55S425TFAA
55S425TFBA
55S423LEAA
55S425LFAA
55S425LHAA
Part Number:
55S421LDAA-MAIN
Warranty:
180-Day Warranty
Visible Number:
40-MST10F-MAA2HG
Visible Number:
08-MST1003-MA200AA
Visible Number:
08-SS55TML-LC324AA
Visible Number:
08-MST1003-MA300AA
Visible Number:
V8-ST10K01-LF1V1286

Videos

What is a power supply board?

Your TVā€™s power supply board takes the AC voltage from your outlet and converts it to various DC voltages needed to power everything in your TV.

Which symptoms does a power supply board fix in a TV?

•  If your TV doesnā€™t turn on, it could be the power supply board.

•  If you see very dim video or no video on the screen, but you know your TV has power and is on, then the power supply could be bad.

•  If your TV turns on and then shuts off quickly, it could be your power supply board.

*These are helpful tips to get you started and donā€™t represent accurate diagnoses for every TV model and failure. If youā€™re unsure of your diagnosis, we recommend checking out our YouTube channel or reaching out to a local TV technician for assistance.

How easy is it to replace a power supply board?

It's easy! Once you match the part number on your power supply board with the part number listed on this page to confirm compatibility, youā€™ll just need a screwdriver and the ability to remove the back of your TV and replace the board.